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3fc1696aca
Summary: Adding contained caching to AliasAnalysis. BasicAA is currently the only one using it. AA changes: - This patch is pulling the caches from BasicAAResults to AAResults, meaning the getModRefInfo call benefits from the IsCapturedCache as well when in "batch mode". - All AAResultBase implementations add the QueryInfo member to all APIs. AAResults APIs maintain wrapper APIs such that all alias()/getModRefInfo call sites are unchanged. - AA now provides a BatchAAResults type as a wrapper to AAResults. It keeps the AAResults instance and a QueryInfo instantiated to batch mode. It delegates all work to the AAResults instance with the batched QueryInfo. More API wrappers may be needed in BatchAAResults; only the minimum needed is currently added. MemorySSA changes: - All walkers are now templated on the AA used (AliasAnalysis=AAResults or BatchAAResults). - At build time, we optimize uses; now we create a local walker (lives only as long as OptimizeUses does) using BatchAAResults. - All Walkers have an internal AA and only use that now, never the AA in MemorySSA. The Walkers receive the AA they will use when built. - The walker we use for queries after the build is instantiated on AliasAnalysis and is built after building MemorySSA and setting AA. - All static methods doing walking are now templated on AliasAnalysisType if they are used both during build and after. If used only during build, the method now only takes a BatchAAResults. If used only after build, the method now takes an AliasAnalysis. Subscribers: sanjoy, arsenm, jvesely, nhaehnle, jlebar, george.burgess.iv, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59315 llvm-svn: 356783
92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
//===- ScopedNoAliasAA.h - Scoped No-Alias Alias Analysis -------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// This is the interface for a metadata-based scoped no-alias analysis.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_SCOPEDNOALIASAA_H
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#define LLVM_ANALYSIS_SCOPEDNOALIASAA_H
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/IR/InstrTypes.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Pass.h"
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#include <memory>
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namespace llvm {
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class Function;
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class MDNode;
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class MemoryLocation;
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/// A simple AA result which uses scoped-noalias metadata to answer queries.
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class ScopedNoAliasAAResult : public AAResultBase<ScopedNoAliasAAResult> {
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friend AAResultBase<ScopedNoAliasAAResult>;
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public:
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/// Handle invalidation events from the new pass manager.
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///
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/// By definition, this result is stateless and so remains valid.
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bool invalidate(Function &, const PreservedAnalyses &,
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FunctionAnalysisManager::Invalidator &) {
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return false;
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}
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AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB,
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AAQueryInfo &AAQI);
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ModRefInfo getModRefInfo(const CallBase *Call, const MemoryLocation &Loc,
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AAQueryInfo &AAQI);
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ModRefInfo getModRefInfo(const CallBase *Call1, const CallBase *Call2,
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AAQueryInfo &AAQI);
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private:
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bool mayAliasInScopes(const MDNode *Scopes, const MDNode *NoAlias) const;
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};
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/// Analysis pass providing a never-invalidated alias analysis result.
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class ScopedNoAliasAA : public AnalysisInfoMixin<ScopedNoAliasAA> {
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friend AnalysisInfoMixin<ScopedNoAliasAA>;
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static AnalysisKey Key;
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public:
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using Result = ScopedNoAliasAAResult;
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ScopedNoAliasAAResult run(Function &F, FunctionAnalysisManager &AM);
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};
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/// Legacy wrapper pass to provide the ScopedNoAliasAAResult object.
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class ScopedNoAliasAAWrapperPass : public ImmutablePass {
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std::unique_ptr<ScopedNoAliasAAResult> Result;
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public:
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static char ID;
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ScopedNoAliasAAWrapperPass();
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ScopedNoAliasAAResult &getResult() { return *Result; }
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const ScopedNoAliasAAResult &getResult() const { return *Result; }
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bool doInitialization(Module &M) override;
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bool doFinalization(Module &M) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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};
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//===--------------------------------------------------------------------===//
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//
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// createScopedNoAliasAAWrapperPass - This pass implements metadata-based
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// scoped noalias analysis.
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//
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ImmutablePass *createScopedNoAliasAAWrapperPass();
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} // end namespace llvm
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#endif // LLVM_ANALYSIS_SCOPEDNOALIASAA_H
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